I've been sent a (HUGE) "graphic intensive" document that's been saved/exported from InDesign CS6 as a "Package for Printing" folder.

If I open the folder on my Mac at home, everything is AOK. If I open the same folder on the Windows PC at work (to print the document), about a dozen of the files in the Fonts folder have no size - 0 kb - report as "missing" and don't print properly.

The original file has been sent across to me several times, it happens every time. I've also been sent the Fonts folder alone - however, it makes no difference. It's always the same fonts, and there doesn't seem to be anything in common with them.